<template>
	<div>
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/Home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>商品管理</el-breadcrumb-item>
			<el-breadcrumb-item>分类参数</el-breadcrumb-item>
		</el-breadcrumb>
		<el-card>
			<el-alert
				title="注意：只允许为第三级分类设置相关参数！"
				type="warning"
				:closable="false"
				show-icon
			>
			</el-alert>
			<el-row class="cat_opt">
				<el-col>
					<span>选择商品分类：</span>
					<el-cascader
						v-model="selectedCateKeys"
						:options="cateList"
						:props="{ expandTrigger: 'hover', ...cateProps }"
						@change="handleChange"
					></el-cascader>
				</el-col>
			</el-row>
			<el-tabs v-model="activeName" @tab-click="handleTapClick">
				<el-tab-pane label="动态参数" name="many">
					<el-button
						type="primary"
						size="mini"
						:disabled="isBtnDisabled"
						@click="addDialogVisible = true"
						>添加参数</el-button
					>
					<el-table :data="manyTableData" border stripe>
					<!-- 动态参数展开行 -->
						<el-table-column type="expand">
							<template slot-scope="scope">
								<el-tag
									v-for="(item, i) in scope.row.attr_vals"
									:key="i"
									closable
									@close="handleClose(i, scope.row)"
									>{{ item }}</el-tag
								>
								<!-- 可添加的标签 -->
								<el-input
									class="input-new-tag"
									v-if="scope.row.inputVisible"
									v-model="scope.row.inputValue"
									ref="saveTagInput"
									size="small"
									@keyup.enter.native="handleInputConfirm(scope.row)"
									@blur="handleInputConfirm(scope.row)"
								>
								</el-input>
								<el-button
									v-else
									class="button-new-tag"
									size="small"
									@click="showInput(scope.row)"
									>+ New Tag</el-button
								>
							</template>
						</el-table-column>
						<el-table-column type="index" label="#"></el-table-column>
						<el-table-column
							label="参数名称"
							prop="attr_name"
						></el-table-column>
						<el-table-column label="操作">
							<template slot-scope="scope">
								<el-button
									size="mini"
									type="primary"
									icon="el-icon-edit"
									@click="showEditDialog(scope.row.attr_id)"
									>编辑</el-button
								>
								<el-button
									size="mini"
									type="danger"
									icon="el-icon-delete"
									@click="removeParams(scope.row.attr_id)"
									>删除</el-button
								>
							</template>
						</el-table-column>
					</el-table>
				</el-tab-pane>
				<el-tab-pane label="静态属性" name="only"
					><el-button
						type="primary"
						size="mini"
						:disabled="isBtnDisabled"
						@click="addDialogVisible = true"
						>添加属性</el-button
					>
					<el-table :data="onlyTableData" border stripe>
					<!-- 静态属性展开行 -->
						<el-table-column type="expand">
							<template slot-scope="scope">
								<el-tag
									v-for="(item, i) in scope.row.attr_vals"
									:key="i"
									closable
									@close="handleClose(i, scope.row)"
									>{{ item }}</el-tag
								>
								<!-- 可添加的标签 -->
								<el-input
									class="input-new-tag"
									v-if="scope.row.inputVisible"
									v-model="scope.row.inputValue"
									ref="saveTagInput"
									size="small"
									@keyup.enter.native="handleInputConfirm(scope.row)"
									@blur="handleInputConfirm(scope.row)"
								>
								</el-input>
								<el-button
									v-else
									class="button-new-tag"
									size="small"
									@click="showInput(scope.row)"
									>+ New Tag</el-button
								>
							</template>
						</el-table-column>
						<el-table-column type="index" label="#"></el-table-column>
						<el-table-column
							label="属性名称"
							prop="attr_name"
						></el-table-column>
						<el-table-column label="操作">
							<template slot-scope="scope">
								<el-button
									size="mini"
									type="primary"
									icon="el-icon-edit"
									@click="showEditDialog(scope.row.attr_id)"
									>编辑</el-button
								>
								<el-button
									size="mini"
									type="danger"
									icon="el-icon-delete"
									@click="removeParams(scope.row.attr_id)"
									>删除</el-button
								>
							</template>
						</el-table-column>
					</el-table>
				</el-tab-pane>
			</el-tabs>
		</el-card>
		<!-- 添加参数对话框  -->
		<el-dialog
			:title="'添加' + titleText"
			:visible.sync="addDialogVisible"
			width="50%"
			@close="addDialogClosed"
		>
			<el-form
				ref="addFormRef"
				:model="addForm"
				label-width="100px"
				:rules="addFormRules"
			>
				<el-form-item :label="titleText" prop="attr_name">
					<el-input v-model="addForm.attr_name"></el-input>
				</el-form-item>
			</el-form>
			<span slot="footer">
				<el-button type="primary" @click="addParams">确 定</el-button>
				<el-button @click="addDialogVisible = false">取 消</el-button>
			</span>
		</el-dialog>
		<!-- 编辑的对话框 -->
		<el-dialog
			:title="'修改' + titleText"
			:visible.sync="editDialogVisible"
			width="50%"
			@close="editDialogClosed"
		>
			<el-form
				ref="editFormRef"
				:model="editForm"
				label-width="100px"
				:rules="addFormRules"
			>
				<el-form-item :label="titleText" prop="attr_name">
					<el-input v-model="editForm.attr_name"></el-input>
				</el-form-item>
			</el-form>
			<span slot="footer">
				<el-button type="primary" @click="editParams">确 定</el-button>
				<el-button @click="editDialogVisible = false">取 消</el-button>
			</span>
		</el-dialog>
	</div>
</template>
<script>
export default {
	data() {
		return {
			cateList: [],
			cateProps: {
				value: 'cat_id',
				label: 'cat_name',
				children: 'children',
			},
			selectedCateKeys: [],
			activeName: 'many',
			manyTableData: [],
			onlyTableData: [],
			addDialogVisible: false,
			addForm: {
				attr_name: '',
			},
			addFormRules: {
				attr_name: [
					{
						required: true,
						message: '请输入名称',
						trigger: 'blur',
					},
				],
			},
			editDialogVisible: false,
			editForm: {},
		}
	},
	created() {
		this.getCateList()
	},
	methods: {
		// 获取分类列表
		async getCateList() {
			const { data: res } = await this.$http.get('categories')
			if (res.meta.status != 200) {
				return this.$message.error('获取商品分类失败 ')
			}
			this.cateList = res.data
		},
		//获取参数列表
		async getParamsData() {
			if (this.selectedCateKeys.length != 3) {
				this.selectedCateKeys = []
				this.manyTableData = []
				this.onlyTableData = []
				return
			}
			const { data: res } = await this.$http.get(
				`categories/${this.cateId}/attributes`,
				{ params: { sel: this.activeName } }
			)
			if (res.meta.status != 200) {
				return this.$message.error('获取参数列表失败')
			}
			//获取标签
			res.data.forEach((item) => {
				item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
				item.inputVisible = false
				item.inputValue = ''
			})
			if (this.activeName == 'many') {
				this.manyTableData = res.data
			} else {
				this.onlyTableData = res.data
			}
		},
		handleChange() {
			this.getParamsData()
		},
		// tab标签的点击事件
		handleTapClick() {
			this.getParamsData()
		},
		addDialogClosed() {
			this.$refs.addFormRef.resetFields()
		},
		// 添加参数
		addParams() {
			this.$refs.addFormRef.validate(async (valid) => {
				if (!valid) {
					return
				}
				const { data: res } = await this.$http.post(
					`categories/${this.cateId}/attributes`,
					{ attr_name: this.addForm.attr_name, attr_sel: this.activeName }
				)
				if (res.meta.status != 201) {
					return this.$message.error('添加失败')
				}
				this.addDialogVisible = false
				this.getParamsData()
				this.$message.success('添加成功')
			})
		},
		async showEditDialog(id) {
			const { data: res } = await this.$http.get(
				`categories/${this.cateId}/attributes/${id}`,
				{ params: { attr_sel: this.activeName } }
			)
			if (res.meta.status != 200) {
				return this.$message.error('获取失败')
			}
			this.editDialogVisible = true
			this.editForm = res.data
		},
		editDialogClosed() {
			this.$refs.editFormRef.resetFields()
		},
		// 修改参数
		editParams() {
			this.$refs.editFormRef.validate(async (valid) => {
				if (!valid) return
				const { data: res } = await this.$http.put(
					`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
					{ attr_name: this.editForm.attr_name, attr_sel: this.activeName }
				)
				if (res.meta.status != 200) {
					return this.$message.error('修改失败')
				}
				this.getParamsData()
				this.editDialogVisible = false
				this.$message.success('修改成功')
			})
		},
		// 删除参数
		async removeParams(id) {
			const confirmResult = await this.$confirm(
				'此操作将永久删除该参数, 是否继续?',
				'提示',
				{
					confirmButtonText: '确定',
					cancelButtonText: '取消',
					type: 'warning',
				}
			).catch((err) => err)
			if (confirmResult != 'confirm') {
				return this.$message.info('已取消删除')
			}
			const { data: res } = await this.$http.delete(
				`categories/${this.cateId}/attributes/${id}`
			)
			if (res.meta.status != 200) {
				return this.$message.error('删除失败')
			}
			this.getParamsData()
			this.$message.success('删除成功 ')
		},
		// 标签文本框
		async handleInputConfirm(row) {
			if (row.inputValue.trim().length == 0) {
				row.inputValue = ''
				row.inputVisible = false
				return
			}
			row.attr_vals.push(row.inputValue.trim())
			row.inputValue = ''
			row.inputVisible = false
			this.saveAttrVals(row)
		},
		showInput(row) {
			row.inputVisible = true
			this.$nextTick(() => {
				this.$refs.saveTagInput.$refs.input.focus()
			})
		},
		async saveAttrVals(row) {
			const { data: res } = await this.$http.put(
				`categories/${this.cateId}/attributes/${row.attr_id}`,
				{
					attr_name: row.attr_name,
					attr_sel: row.attr_sel,
					attr_vals: row.attr_vals.join(' '),
				}
			)
			if (res.meta.status != 200) {
				return this.$message.error('添加标签失败')
			}
			this.$message.success('添加成功')
		},
		//删除标签
		handleClose(i, row) {
			row.attr_vals.splice(i, 1)
			this.saveAttrVals(row)
		},
	},
	// 如果按钮需要被禁用，则返回true在。否则返回false
	computed: {
		isBtnDisabled() {
			if (this.selectedCateKeys.length != 3) {
				return true
			}
			return false
		},
		cateId() {
			if (this.selectedCateKeys.length == 3) {
				return this.selectedCateKeys[2]
			}
			return null
		},
		// 计算对话框标题
		titleText() {
			if (this.activeName == 'many') {
				return '动态参数'
			}
			return '静态属性'
		},
	},
}
</script>
<style lang="less" scoped>
.cat_opt {
	margin: 15px 0px;
}
.el-tag {
	margin: 10px 5px;
}
.input-new-tag {
	width: 120px;
}
</style>
